耦合双阱超晶格的量子多体动力学
Quantum Many-Body Dynamics of Coupled Double-Well Superlattices
摘要：
提出了一种利用光学超晶格中的旋量原子可控产生非局域纠缠对的方法。我们的方案通过控制双阱之间的耦合来迭代地增加纠缠原子之间的距离。当在2N个原子的有限线性链中实现时，它产生具有大纠缠持久性（N阶）的三重价键态。我们还研究了一维铁磁海森堡哈密顿量的非平衡动力学，并表明每个双阱上的解耦三重态的时间演化导致形成一个高度纠缠态，其中短距离反铁磁关联与长距离铁磁关联共存。我们提出了各种动态生成的状态的检测和表征的方法。这些想法是朝着使用被光捕获的原子作为量子信息处理器和量子模拟器迈出的一步。
英文摘要：
We propose a method for controllable generation of non-local entangled pairs using spinor atoms loaded in an optical superlattice. Our scheme iteratively increases the distance between entangled atoms by controlling the coupling between the double wells. When implemented in a finite linear chain of 2N atoms, it creates a triplet valence bond state with large persistency of entanglement (of the order of N). We also study the non-equilibrium dynamics of the one-dimensional ferromagnetic Heisenberg Hamiltonian and show that the time evolution of a state of decoupled triplets on each double well leads to the formation of a highly entangled state where short-distance antiferromagnetic correlations coexist with longer-distance ferromagnetic ones. We present methods for detection and characterization of the various dynamically generated states. These ideas are a step forward towards the use of atoms trapped by light as quantum information processors and quantum simulators.
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